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39 is not prime because 13 and 3 are factors of it. To be prime the number cannot have any factors except itself and 1.

Q: What number is not an prime number 17 39 23 31?

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17, 23 and 31 are prime. 39 is not.

17, 23 and 31 are prime. 39 is not.

51 is not a prime number: 3x17=51

17, 19, 23, 29, and 31

51 is composite number

Related questions

17, 23 and 31 are prime. 39 is not.

17, 23 and 31 are prime. 39 is not.

39

51 is not a prime number: 3x17=51

17, 19, 23, 29, and 31

51 is composite number

17, 31 and 23 are.

51 = 3 x 17

17, 19, 23, 29, and 31

No, 12121 is composite. Its prime factors are: 31 x 23 x 17 = 12121

prime numbers above 13 = 17, 19, 23, 29, 31,...

7 11 13 17 19 23 29.